CN113371815A - iron-series-Fenton degradation-resistant wastewater treatment reactor and method thereof - Google Patents
iron-series-Fenton degradation-resistant wastewater treatment reactor and method thereof Download PDFInfo
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- CN113371815A CN113371815A CN202110818420.0A CN202110818420A CN113371815A CN 113371815 A CN113371815 A CN 113371815A CN 202110818420 A CN202110818420 A CN 202110818420A CN 113371815 A CN113371815 A CN 113371815A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The invention discloses an iron-series-Fenton degradation-resistant wastewater treatment reactor and a method thereof, belonging to the field of wastewater treatment. The reactor comprises a reactor body, wherein an annular water distribution device is arranged on the periphery of the bottom of the reactor body, a three-phase separation device is arranged at the top of the reactor body, an iron catalyst is filled in the reactor body, a step stirring device is arranged in the reactor body in an extending manner from the top of the reactor body to the bottom, and through the specific structural design of the water distribution device, the three-phase separation device and the step stirring device, wastewater, a reaction reagent and the catalyst are fully contacted, so that the reaction efficiency of the catalyst is improved, and meanwhile, iron ions loaded by the iron catalyst participate in a Fenton reaction, so that the dosage of ferrous salt is reduced to reduce the sludge production.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to an iron-series-Fenton degradation-resistant wastewater treatment reactor and a method thereof.
Background
At present, the pretreatment of high-concentration organic wastewater usually adopts a Fenton advanced oxidation treatment process, the Fenton treatment process is widely applied to advanced oxidation processes for treating dye, printing and dyeing, heavy metal and pesticide wastewater, and the Fenton advanced oxidation treatment process has more obvious advantages particularly for industrial wastewater with high salinity, high COD and high chroma compared with other processes. In the treatment process, the Fenton advanced oxidation process is generally used for pretreatment of wastewater or is combined with other processes to achieve the purpose of removing pollutants, but the large dosage of a medicament, the large sludge yield and the relatively low reaction efficiency are always main limiting factors of the process engineering application.
The research shows that the Chinese patent application with the application publication number of CN107162158A and the application publication number of 2017, 9 and 15 discloses a fluidized bed Fenton reactor and a method, the reactor is provided with a catalyst inlet for raw water and catalyst to enter and an oxidant inlet for raw water and oxidant to enter at the bottom of a reaction tank body, the catalyst inlet is connected with a first water distribution head, the oxidant inlet is connected with a second water distribution head, a three-phase separator is arranged above a main reaction zone, the uniform water distribution is ensured through the arrangement of a plurality of water distribution heads, and the loss of crystals is avoided through the arrangement of the three-phase separator, but the invention still has the problem of relatively low catalyst reaction efficiency.
Disclosure of Invention
1. Problems to be solved
Aiming at the problems of large reagent dosage, large sludge yield, relatively low catalyst reaction efficiency and the like in the wastewater treatment in the prior art, the invention provides an iron-series-Fenton degradation-resistant wastewater treatment reactor and a method thereof. The reactor comprises an annular water distribution device arranged on the periphery of the bottom of a reactor body, a three-phase separation device arranged at the top of the reactor body and filled with an iron catalyst, a stirring device extending from the top to the bottom of the reactor body and arranged in the reactor body, wherein the stirring device comprises a first stirring area, a second stirring area and a third stirring area from the top to the bottom, and through the specific structural design of the water distribution device, the three-phase separation device and the stirring device, the bottom is uniformly filled with water and the stirring is combined in a stepped manner, so that wastewater, reaction reagents and the catalyst are fully contacted, the reaction efficiency of the catalyst is improved, and meanwhile iron ions loaded by the iron catalyst participate in a Fenton reaction, and the adding amount of ferrous salt is reduced to reduce the sludge production amount.
2. Technical scheme
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the iron-series-Fenton degradation-resistant wastewater treatment reactor comprises a reactor body, wherein an annular water distribution device is arranged on the periphery of the bottom of the reactor body, a three-phase separation device is arranged at the top of the reactor body, and an iron-series catalyst is filled in the reactor body; from reactor body top-down extension be provided with agitating unit, agitating unit is vertical to be set up inside the reactor body to the agitating unit bottom is located the water distribution device top, and wherein agitating unit includes first stirring district, second stirring district and third stirring district, and first stirring district is close to reactor body top position department, and third stirring district is close to reactor body bottom position department, and the second stirring district is located between first stirring district and the third stirring district.
Preferably, the height ratio between the first, second and third stirring zones is 1: (1.2-1.8): 1.
preferably, first stirring blades are arranged in the first stirring area, second stirring blades are arranged in the second stirring area, third stirring blades are arranged in the third stirring area, the number N1 of the first stirring blades is the same as the number N3 of the third stirring blades, and is less than the number N2 of the second stirring blades, that is, N1 is N3< N2.
Preferably, the height-diameter ratio of the reactor body is (2-2.5): 1.
preferably, the water distribution device is an annular rotational flow water distribution device, the water distribution device comprises a main water distribution pipe and a plurality of branch water distribution pipes, and an included angle alpha between the main water distribution pipe and the branch water distribution pipes is 45-60 degrees.
Preferably, a ferrous sulfate feeding device is arranged on the side surface of the water inlet pipe of the water distribution device.
Preferably, the three-phase separation device is vertically provided with sealing plates on four sides, and the sealing plates are connected with the top end of the reactor body in a sealing manner.
Preferably, the ratio between the projected area of the three-phase separation device and the cross-sectional area of the reactor body is 1: (2-4), and the diameter of the air pipe in the three-phase separator is 40-100 mm.
Preferably, the lengths of the first stirring paddle, the second stirring paddle and the third stirring paddle are the same, and the ratio of the lengths of the first stirring paddle, the second stirring paddle and the third stirring paddle to the diameter of the reactor body is 1: (4-6).
Preferably, the number of the first stirring blades N1 and the number of the third stirring blades N3 are 2-3, and the number of the second stirring blades N2 is 3-4.
Preferably, the distance between the first stirring blade and the three-phase separation device is 400-800 mm, the second stirring blade is positioned at the height of 2/5-3/5 of the reactor body, and the distance between the third stirring blade and the water distribution device is 400-600 mm.
Preferably, the hydrogen peroxide feeding device is arranged at a position close to the bottom of the reactor body and above the third stirring blades, and the hydrogen peroxide feeding device is a group of stainless steel tubes penetrating through the transverse section of the reactor body.
Preferably, the diameter of the pipeline of the hydrogen peroxide adding device is 20-30 mm, a plurality of perforations are arranged on the pipeline of the hydrogen peroxide adding device, and the downward direction of the perforations and the horizontal direction form an angle of 45-60 degrees.
Preferably, the diameter of the main water distribution pipe is 50-100 mm, the diameter of the branch water distribution pipe is 25-50 mm, and the number of the branch water distribution pipes is 4-8.
Preferably, the bottom of the reactor body is further provided with a sludge discharge device, and the sludge discharge device comprises a sludge collection barrel, a sludge discharge main pipe and a plurality of sludge discharge branch pipes.
Preferably, the iron-based catalyst is a mesoporous molecular sieve loaded with iron-based oxides.
The iron-series-Fenton degradation-resistant wastewater treatment method adopts the iron-series-Fenton degradation-resistant wastewater treatment reactor for treatment, wherein the total hydraulic retention time of wastewater in the reactor body is 2-4 h, and the stirring projection area of the wastewater is 10% -25% of the cross-sectional area of the reactor body.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the iron-series-Fenton degradation-resistant wastewater treatment reactor, a special annular uniform rotational flow water distribution device is adopted, so that water distribution is more uniform than that of the traditional single-point or single-line water distribution, the reaction efficiency is favorably improved, and the water distributor is easy to disassemble and clean and prevents blockage;
(2) compared with the traditional stirring device, the step stirring device reasonably designed in the invention has stronger pertinence, can improve the reaction efficiency and reduce the loss of the catalyst;
(3) compared with the traditional three-phase separator, the adopted three-phase separator greatly reduces the material area, reduces the loss rate of the catalyst and can collect oxygen in a centralized manner;
(4) according to the iron-series-Fenton degradation-resistant wastewater treatment method, the wastewater, the reaction reagent and the catalyst are fully contacted through the specific structural design of the water distribution device, the three-phase separation device and the step stirring device, the reaction efficiency of the catalyst is improved, iron ions loaded by the iron-series catalyst participate in the Fenton reaction, the dosage of ferrous salt is reduced, the sludge production is reduced, and secondary pollution is reduced.
Drawings
FIG. 1 is a schematic structural view of an iron-based Fenton degradation-resistant wastewater treatment reactor according to the present invention;
FIG. 2 is a schematic structural view of a water distribution device of the present invention;
FIG. 3 is a schematic structural view of a sludge discharging apparatus of the present invention;
in the figure:
100. a reactor body; 200. a water distribution device; 210. a water distribution main pipe;
220. a water distribution branch pipe; 300. a three-phase separation device; 310. closing the plate;
400. a stirring device; 410. a first agitation zone; 420. a second agitation zone;
430. a third agitation zone; 4101. a first stirring blade; 4201. a second stirring blade;
4301. a third stirring blade; 500. a sludge discharge device; 510. a mud collecting barrel;
520. a sludge discharge main pipe; 530. a sludge discharge branch pipe; 600. a hydrogen peroxide feeding device;
700. a ferrous sulfate feeding device.
Detailed Description
The invention is further described with reference to specific examples.
As shown in FIG. 1, the iron-based Fenton degradation-resistant wastewater treatment reactor comprises a reactor body 100, wherein the height-diameter ratio of the reactor body 100 is (2-2.5): 1; the reactor comprises a reactor body 100, wherein an annular water distribution device 200 is arranged on the periphery of the bottom of the reactor body 100, the water distribution device 200 is an annular rotational flow water distribution device, the water distribution device 200 comprises 1 group of water distribution main pipes 210 and 4-8 groups of water distribution branch pipes 220, the water distribution main pipes 210 surround the outside of the reactor body 100 and are regular octagonal pipelines with the diameter of 50-100 mm, the water distribution branch pipes 220 are jet type water distribution branch pipes with the diameter of 25-50 mm, and an included angle alpha between the water distribution main pipes 210 and the water distribution branch pipes 220 is 45-60 degrees (as shown in figure 2).
The reactor body 100 is provided with a three-phase separation device 300 at the top, the three-phase separation device 300 comprises a clamping plate, a triangular weir, a gas collection tank and a gas collection flange pipe (not shown), sealing plates 310 are vertically arranged on four sides of the three-phase separation device 300, and the sealing plates 310 are connected with the top end of the reactor body in a sealing manner. The ratio of the projected area of the three-phase separation device 300 to the cross-sectional area of the reactor body 100 is 1: (2-4), and the diameter of the gas collecting flange pipe in the three-phase separator 300 is 40-100 mm.
The stirring device 400 extends from the top to the bottom of the reactor body 100, the stirring device 400 is vertically arranged inside the reactor body 100, and the bottom of the stirring device 400 is located above the water distribution device 200. It should be noted that the stirring device 400 is a step stirring device, the stirring device 400 includes a first stirring area 410, a second stirring area 420 and a third stirring area 430, the first stirring area 410 is located near the top end of the reactor body 100, the third stirring area 430 is located near the bottom end of the reactor body 100, the second stirring area 420 is located between the first stirring area 410 and the third stirring area 430, wherein the height ratio between the first stirring area 410, the second stirring area 420 and the third stirring area 430 is 1: (1.2-1.8): 1.
further, a first stirring blade 4101 is provided in the first stirring zone 410, a second stirring blade 4201 is provided in the second stirring zone 420, and a third stirring blade 4301 is provided in the third stirring zone 430. The distance between the first stirring blade 4101 and the three-phase separation device 300 is 400 mm-800 mm, the second stirring blade 4201 is positioned at the height of 2/5-3/5 of the reactor body 100, and the distance between the third stirring blade 4301 and the water distribution device 200 is 400 mm-600 mm.
The number N1 of the first agitating blades 4101 is the same as the number N3 of the third agitating blades 4301 and is smaller than the number N2 of the second agitating blades 4201, i.e., N1 ═ N3< N2. Generally, the number N1 of the first stirring blades 4101 and the number N3 of the third stirring blades 4301 are 2 to 3, and the number N2 of the second stirring blades 4201 is 3 to 4. And, the lengths of the first, second, and third agitating blades 4101, 4201, 4301 are the same, and the ratio of the lengths of the first, second, and third agitating blades 4101, 4201, 4301 to the diameter of the reactor body 100 is 1: (4-6).
In addition, a hydrogen peroxide adding device 600 is arranged at a position close to the bottom of the reactor body 100 and above the third stirring blade 4301, and is used for adding an oxidant hydrogen peroxide into the reactor. The hydrogen peroxide adding device 600 is a group of stainless steel pipes with the diameter of 20 mm-30 mm, and penetrates through the transverse section of the reactor body 100, and a plurality of perforations are arranged on the pipeline of the hydrogen peroxide adding device 600, and the downward direction of the perforations and the horizontal direction form a 45-60 degree angle. And, a ferrous sulfate adding device 300 is provided on the side of the water inlet pipe of the water distribution device 200 for adding a medicament (such as ferrous sulfate) into the reactor.
Further, the reactor main body 100 is filled with an iron-based catalyst, which is a mesoporous molecular sieve supporting an iron-based oxide. The adoption of the iron catalyst can reduce the sludge amount generated by Fenton reaction and reduce secondary pollution.
As shown in fig. 3, a sludge discharge device 500 is further disposed at the bottom of the reactor body 100, and the sludge discharge device 500 includes a sludge collecting barrel 510, a sludge discharge main pipe 520 and a plurality of sludge discharge branch pipes 530. The mud collection barrel 510 is a cylindrical barrel with 1 set, a cover plate is arranged on the upper portion of the barrel, the mud discharge main pipe 520 is a steel pipe with 1 set of diameter being 150-200 mm, the mud discharge branch pipe 530 is a steel pipe with 4-6 sets of diameter being 80-125 mm, and the mud discharge branch pipes are uniformly distributed around the mud collection barrel 510.
The iron-series-Fenton degradation-resistant wastewater treatment reactor disclosed by the invention is used for wastewater treatment, wastewater enters the reactor body through the annular water distribution device, ferrous sulfate is added into the reactor through the ferrous sulfate adding device 300 arranged on the side surface of the water inlet pipe of the water distribution device 200, and meanwhile, hydrogen peroxide is added into the reactor through the hydrogen peroxide adding device 600. After the wastewater is subjected to acid adjustment, the pH value of the wastewater in the reactor is ensured to be 3-4, and the stepped stirrer is started, so that the stirring projection area of the wastewater is about 10-25% of the cross section area of the reactor body, and the internal reaction of the reactor is ensured to be sufficient. Under the catalytic action of an iron catalyst, a water body, a reaction reagent and the catalyst are fully contacted and reacted to generate hydroxyl radicals, so that a chain is broken, the toxicity of the wastewater is reduced, and the biodegradability is greatly improved, wherein the total hydraulic retention time of the wastewater in a reactor body is 2-4 h.
It should be noted that the annular uniform rotational flow water distribution device can make the dosing and water inlet more uniform, and the combination of the step stirring device can improve the Fenton reaction efficiency and reduce the dosing amount of medicaments such as hydrogen peroxide. The three-phase separation device separates oxygen generated by decomposing the wastewater, the catalyst and the hydrogen peroxide, the wastewater flows out from a water outlet at the top of the reactor after the Fenton reaction, the catalyst is intercepted by the three-phase separation device and returns to the inside of the reactor body, the loss of the catalyst is reduced, the separation of the catalyst and a reaction water body is realized, and the oxygen overflows from a gas collecting pipe of the three-phase separation device. The iron catalyst can reduce the sludge amount generated by Fenton reaction and reduce secondary pollution.
Example 1
The reactor body of this example is a cylindrical carbon steel anticorrosion tank body with a diameter of 2 meters and a height of 5 meters, wherein the heights between the first stirring zone, the second stirring zone and the third stirring zone are 1m, 1.2m and 1m respectively, and the height of the three-phase separator is 0.3 m. The vertical distance between the first stirring paddle and the three-phase separation device is 600mm, the number of the first stirring paddle is 2, the second stirring paddle is located at the 1/2 height position of the reaction zone, the number of the second stirring paddle is 3, the vertical distance between the third stirring paddle and the water distribution device is 500mm, the number of the third stirring paddle is 2, the length of single slurry of the three groups of stirring paddles is equal, the single slurry is 1/6 the diameter of the reaction tank, and the paddle is made of carbon steel lining glue.
The water distribution device comprises 1 group of main water distribution pipes and 8 groups of detachable jet type water distribution branch pipes, the diameter of each main water distribution pipe is 50mm, the diameter of each branch water distribution pipe is 25mm, and the horizontal included angle alpha between each main water distribution pipe and each branch water distribution pipe is 45 degrees. Each group of branch pipelines is provided with 2 groups of gate valves, and the gate valves are easy to disassemble and clean.
The front end of the water inlet pipe of the water distribution device is provided with a ferrous sulfate feeding device which is 1 set of dosing static mixer with the diameter of 50 mm. The hydrogen peroxide adding device is 1 set of 304 stainless steel pipes, the diameter of the hydrogen peroxide adding device is 20mm, the hydrogen peroxide adding device horizontally penetrates through the tank body and is positioned above the third stirring paddle blades, the diameter of a perforation of the hydrogen peroxide adding pipe is 8mm, the downward direction and the horizontal direction form an angle of 45 degrees, and the distance between the hydrogen peroxide adding holes is 40 mm. The three-phase separation device is of a three-layer structure and comprises a clamping plate, a triangular weir, a gas collection box, a sealing plate, a gas collection flange pipe and the like, and the overall size is 1m x 0.3 m.
The sludge discharge device comprises 1 group of sludge discharge main pipes and 6 groups of sludge discharge branch pipes, the diameter of each sludge discharge main pipe is 150mm, the diameter of each sludge discharge branch pipe is 100mm, and the sludge discharge branch pipes are horizontally and uniformly arranged.
The method for treating iron-series-Fenton degradation-resistant wastewater comprises the steps of treating wastewater by using biochemically treated garbage leachate, adjusting the pH value of inlet water to 3-4, adjusting the treatment capacity to 5m3/H, adding 0.5m3 of an iron-series catalyst, adjusting the COD of the inlet water to 600-800 mg/L and the B/C to 0.1, controlling the concentration ratio (mg/L) of H2O2 to the COD of the inlet water to be 1:1, adding H2O2 to the FeSO4 in a molar ratio of 6:1, and keeping the total hydraulic retention time of the garbage to be treated in a reactor body to be about 2H, reducing the neutralized COD to 200-300 mg/L after treatment, and increasing the B/C to 0.35.
Example 2
The basic contents of this embodiment are the same as embodiment 1, except that: the treated wastewater is cellulose ether wastewater, the treatment capacity is 4m3/H, the inlet COD is 700-850 mg/L, the B/C is 0.12, the concentration ratio (mg/L) of H2O2 to the inlet COD is controlled to be 1.2:1, the molar ratio of the added H2O2 to the added FeSO4 is 5:1, the total hydraulic retention time of the cellulose ether wastewater to be treated in the reactor body is about 2.5H, the neutralized COD is reduced to 500-650 mg/L after treatment, and the B/C is increased to 0.41.
Example 3
The basic contents of this embodiment are the same as embodiment 1, except that: the treated wastewater is coke quenching wastewater, the treatment capacity is 3m3/H, the influent COD is 35000-40000 mg/L, the B/C is 0.07, the concentration ratio (mg/L) of H2O2 to the influent COD is controlled to be 0.8:1, the molar ratio of the added H2O2 to the FeSO4 is 7:1, the total hydraulic retention time of the coke quenching wastewater to be treated in the reactor body is about 3.3H, the neutralized COD is reduced to 12000-20000 mg/L after treatment, and the B/C is increased to 0.29.
The present invention and its embodiments have been described above schematically, the description is not restrictive, the data used are only one of the embodiments of the present invention, and the actual data combination is not limited to this. Therefore, if the person skilled in the art receives the teaching, the embodiments and examples similar to the above technical solutions shall not be designed in an inventive manner without departing from the spirit of the present invention, and shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides an iron system-fenton degradation-resistant effluent treatment reactor which characterized in that: the reactor comprises a reactor body (100), wherein an annular water distribution device (200) is arranged on the periphery of the bottom of the reactor body (100), a three-phase separation device (300) is arranged at the top of the reactor body (100), and an iron catalyst is filled in the reactor body (100); from top to bottom extension of reactor body (100) top is provided with agitating unit (400), agitating unit (400) vertical setting is inside reactor body (100), and agitating unit (400) bottom is located water distributor (200) top, wherein agitating unit (400) include first stirring district (410), second stirring district (420) and third stirring district (430), first stirring district (410) are close to reactor body (100) top position department, third stirring district (430) are close to reactor body (100) bottom position department, second stirring district (420) are located between first stirring district (410) and third stirring district (430).
2. The iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 1, wherein: the height ratio between the first agitation zone (410), the second agitation zone (420), and the third agitation zone (430) is 1: (1.2-1.8): 1.
3. the iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 1, wherein: the first stirring zone (410) is internally provided with a first stirring blade (4101), the second stirring zone (420) is internally provided with a second stirring blade (4201), the third stirring zone (430) is internally provided with a third stirring blade (4301), and the number N1 of the first stirring blade (4101) is the same as the number N3 of the third stirring blade (4301) and is smaller than the number N2 of the second stirring blade (4201), namely N1 is N3< N2.
4. The iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 1, wherein: the height-diameter ratio of the reactor body (100) is (2-2.5): 1.
5. the iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 1, wherein: the water distribution device (200) is an annular rotational flow water distribution device, the water distribution device (200) comprises a main water distribution pipe (210) and a plurality of branch water distribution pipes (220), and an included angle alpha between the main water distribution pipe (210) and the branch water distribution pipes (220) is 45-60 degrees.
6. The iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 1, wherein: the ratio of the projection area of the three-phase separation device (300) to the cross-sectional area of the reactor body (100) is 1: (2-4), and the diameter of the air pipe in the three-phase separator (300) is 40-100 mm.
7. The iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 3, wherein: the first stirring paddle (4101), the second stirring paddle (4201) and the third stirring paddle (4301) are the same in length, and the ratio between the lengths of the first stirring paddle (4101), the second stirring paddle (4201) and the third stirring paddle (4301) and the diameter of the reactor body (100) is 1: (4-6);
alternatively, the number N1 of the first stirring blades (4101) and the number N3 of the third stirring blades (4301) are 2 to 3, and the number N2 of the second stirring blades (4201) is 3 to 4.
8. The iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 3, wherein: the distance between the first stirring paddle (4101) and the three-phase separation device (300) is 400-800 mm, the second stirring paddle (4201) is positioned at the height of 2/5-3/5 of the reactor body (100), and the distance between the third stirring paddle (4301) and the water distribution device (200) is 400-600 mm.
9. The iron-based Fenton degradation-resistant wastewater treatment reactor according to claim 5, wherein: the diameter of the main water distribution pipe (210) is 50-100 mm, the diameter of the branch water distribution pipe (220) is 25-50 mm, and the number of the branch water distribution pipes (220) is 4-8.
10. A method for treating iron-series-Fenton degradation-resistant wastewater is characterized by comprising the following steps: the iron-based Fenton degradation-resistant wastewater treatment reactor according to any one of claims 1 to 9 is used for treatment, wherein the total hydraulic retention time of wastewater in the reactor body is 2-4 h, and the stirring projected area of wastewater is 10-25% of the cross-sectional area of the reactor body.
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| CN104876319A (en) * | 2015-05-19 | 2015-09-02 | 四川大学 | Fenton-like reactor, and toxic nondegradable wastewater treatment device and method |
| US20190084858A1 (en) * | 2016-03-22 | 2019-03-21 | Chinese Research Academy Of Environmental Sciences | Method for treating and recycling organic wastewater and apparatus |
| CN205999108U (en) * | 2016-08-31 | 2017-03-08 | 湖南省科建市政工程有限公司 | A kind of oxidizing tower for advanced treatment of wastewater |
| CN107162158A (en) * | 2017-07-20 | 2017-09-15 | 山东山大华特科技股份有限公司 | A kind of fluid bed Fenton reactor and method |
| CN107555579A (en) * | 2017-10-17 | 2018-01-09 | 中冶赛迪工程技术股份有限公司 | Stirring-type Fenton reactor |
| CN109081474A (en) * | 2018-09-29 | 2018-12-25 | 南京万德斯环保科技股份有限公司 | One type Fenton reactor and the method for processing landfill leachate MBR water outlet |
| CN112573728A (en) * | 2020-12-23 | 2021-03-30 | 桂润环境科技股份有限公司 | Integrated iron-carbon-Fenton coupling catalytic oxidation reactor and wastewater treatment method |
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